\newproblem{lay:2_1_8}{
  % Problem identification
	\begin{large}
	  \hspace{\fill}\newline
    \textbf{Lay, 2.1.8}
	\end{large}
	\\
  \ifthenelse{\boolean{identifyAuthor}}{\textit{Carlos Oscar Sorzano, Aug. 31st, 2013} \\}{}

  % Problem statement
  How many rows does B have if BC is a 5 x 4 matrix?
	\\
}{
   % Solution
		
		
		
		Let's say $BC=D$. 
		
		D will be a 5 x 4 matrix if and only if $B_{5,i}$ and $C_{i,4}$. 
		
		Therefore, B has 5 rows.
}
\useproblem{lay:2_1_8}
\ifthenelse{\boolean{eachProblemInOnePage}}{\newpage}{}
